“Black and Potter. Ringleaders of their little gang. Both very bright, of course- exceptionally bright, in fact.” 

“You’re have thought Black and Potter were brothers” chimed in Professor Flitwick. “Inseparable.”

“Of course they were,” said Fudge, “Potter trusted Black beyond all his other friends. Nothing changed when they left school. Black was best man when James married Lily. Then they named his godfather to Harry.”